Like many caldera structures around the world, Phlegrean Fields caldera (Italy) periodically undergoes volcanic unrest, characterized by seismic activity and vertical ground displacement (bradyseism). These bradyseismic crises are usually interpreted as the product of pressure increment at the magma chamber level, but the existence of an important hydrothermal system in the area suggests that t...

the kuh shah prospecting area is located in tertiary volcano-plutonic belt of the lut block. more than seventeen subvolcanic intermediate to acidic intrusive rocks, diorite to syenite in composition, were identified in the study area. the intrusions are related to hydrothermal alteration zones and contain argillic, propylitic, advanced argillic, silicified, quartz-sericite-pyrite, gossan and hy...

nano-sized batio3 powders with particular nb concentrations were prepared by rotary- hydrothermal (rh) method. hydrothermal method was used at 180 °c for 5 hours with new ti pressure and the teflon vessel was rotated at a speed of 160 rpm during the hydrothermal reaction. new hydrothermal method was used instead of previous solid state reaction for the system batio3±nb2o3 in high temperature to...

Abstract Multi-beam bathymetry technology plays an important role in ocean, river and lake surveying mapping. According to the measurement principle technical requirements of MS8200 multi-beam system, this paper introduces composition working installation calibration data post-processing process, sea area terrain characteristics near Wenchang Qinglan Port are taken as research object discuss du...

introduction the kahang cu- mo deposit is situated approximately 73 km northeast of isfahan. asadi (2007) identified a geological reserve of 40 mt (proven reserve) grading at 0.53 cu, 0.02 mo and estimated reserve of 120 mt. all the rock types in the region have been subjected to hydrothermal solutions which gave rise to three different alteration facies. the dacite and rhyodacite volcanic rock...